The Old Sarum Ley was identified by Sir Norman Lockyear, and runs from north of Stonehenge to the western bank of Frankenbury Camp, near Fordinbridge, Hampshire.
This photo was taken from Old Sarum, an Iron Age hill-fort, which became a Roman town, then Saxon and eventually a fortified castle and cathedral, once the residence of King Henry I and subsequent Plantagenet monarchs. It was also used as a base of operation by William the Conqueror.
Also on this alignment is Salisbury Cathedral, thought to be the location of an ancient, blind spring, which is thought to attract a large number of flying insects and birds.
Aligned with the cathedral on the hilltop beyond is the wooded Clearbury Ring, an Iron Age hill fort in Wiltshire, 3 miles south of Salisbury city centre. It consists of a single bank and ditch, with a single entrance.